Description: Celestia is a free, open-source space simulation software that allows users to visualize and explore outer space. It renders high-resolution photographic images of planets, moons, stars, galaxies, and more from real astronomical data. Celestia is available for Windows, macOS, and Linux.
Type: software
Pricing: Open Source
Description: StarCalc is a free, open-source spreadsheet program similar to Microsoft Excel. It has many of the core spreadsheet features like formulas, charts, pivot tables, and data analysis tools. StarCalc is lightweight, customizable, and available on Windows, Mac, and Linux.
Type: software
Pricing: Open Source